"An odd lightheadedness came over her, like pages riffling in a huge book in her mind." I wanted to tell the author of this sentence that I don't quite understand the metaphor, but then I realized I don't know if its a metaphor or a similie or an analogy or a whatchamacallit
You could argue that lightheadedness might be a metaphor - her head doesn't actually get any lighter, and in my experience heads don't feel particularly light when I'm dizzy/confused... but the pages riffling part is a simile - the word "like" is the indicator.
Yeah I am pretty certain you're right. That's a similie. As far as I know, a similie is basically when you are using figurative speech to make comparisons, usually with the words "as" or "like" as a connector for example. Metaphor is to say that something is literally something else... even though is technically isn't. So the metaphor version of what you said would be Bob was a pig with his eating habits.
@ChickenFreak This is neither a Simile nor is this a Metaphor, it is a Hyperbole. A Hyperbole is a figure of speech that exaggerates something, creates a strong impression. (The strong impression is his eating habits.)